i need some assistance with regards to travelling...i have to start charging for travelling so how much is a fair rate to bill a customer?

i use to charge 1.50 p/km but stopped years ago.

i thought R4.50 p/km is reasonable because i average around 1200 km a month x by 4.5 = R5400...which would pretty much cover my vehicle expenses and petrol account.
do you think this fair?

anyone know what the aa rater is?